My , it looks too queer !   Yes , it is a queer drug , a tonic only available in China . Many ancient Chinese medicine journals have recorded that it can cure such ailments as night sweat , pain at loins and knees and anaemia . It has no side effect .   Great ! Will you please tell me how to take it ?   Yes , madam . Fill 3 or 5 pieces of Cordyceps into a cleaned and chopped open duck's head and cook with the whole duck . Or stew Cordyceps with chicken .   That sounds very interesting !   Please don't eat turnip and garlic when taking this medicine .   Thank you very much . 